Oxidations of substituted phenols with hypervalent iodine : Applications to the phthalide annulation route to anthraquinones
作者:Anthony S. Mitchell、Richard A. Russell
DOI:10.1016/0040-4039(93)85123-e
日期:1993.1
Substituted phenols are oxidized by phenyliodonium diacetate in methanol to yield either cyclohexa-2,4- or the isomeric 2,5-dienones depending upon the structure of the phenol. Annulation of these oxidation products with the anion of 3-cyanophthalide affords access to a range of anthraquinones not previously accessible by this route.
Oxidation with hypervalent iodine reagents. Part II: Novel cyclohexadienones as precursors for the synthesis of anthraquinones
作者:Anthony S. Mitchell、Richard A. Russell
DOI:10.1016/s0040-4020(97)00110-5
日期:1997.3
2,4-cyclohexadienones, 2,5-cyclohexadienones or mixtures of isomers, depending on the substrate being oxidized. Annulation of these cyclohexadienones with the anion of 3-cyanophthalide afforded anthraquinones in high yields.
Reactions of ketene acetals 15. Regiospecific syntheses of erythrolaccin and “7-hydroxyerythrolaccin”.
作者:Vincent Guay、Paul Brassard
DOI:10.1016/s0040-4020(01)91252-9
日期:1984.1
cyanohydrin nand the β γ-Unsaturated eater. The usefulness of the reagent is demonstrated by advantageous syntheses of the naturally occuring title-compounds and of various partiallymethylated analogues. The electron-donating substituents on the diene are disposed in order to illustrate the consequence of their oppossing electronic effects.